Application of Electric Tools

In 1895, Germany’s Panhans manufactured the world’s first direct current electric drill. Its casing was made of cast iron and could drill 4mm holes in steel plates. Subsequently, three-phase mains frequency (50Hz) electric drills emerged, but the motor speed did not exceed 3000r/min. In 1914, electric tools driven by single-phase series-excited motors appeared, with motor speeds exceeding 10,000r/min. In 1927, mid-frequency electric tools with power frequencies of 150-200Hz emerged. They combined the advantages of high-speed single-phase series-excited motors with the simple and reliable structure of three-phase mains frequency motors. However, their use was limited due to the requirement of mid-frequency current supply.

Applications of electric tools include:

In the mechanical industry: drilling, sawing, polishing, rust removal, grinding, and fastening of screws, bolts, and nuts.

In construction and decoration: drilling in concrete, reinforcing bars installation, wall slotting, concrete mixing, cutting ceramic tiles and stones, etc.

In agriculture and mining: water conservancy construction, tunneling, rock excavation, concrete compaction, etc.

In gardening, forestry, and construction: logging, timber harvesting, tree planting, pruning, lawn repair, branch shredding, etc.

In wood processing and manufacturing: sawing, planing, cutting, carving, polishing, etc.

Additionally, there are also some niche applications in the medical and arts and crafts industries, among other specialized fields. Therefore, the application of electric tools has penetrated into various industries and is extremely extensive.